A press release released Wednesday (May 9) from the band explained the situation, offering apologies to fans. “Blink-182’s drummer, Travis Barker, required an urgent tonsillectomy with a recovery period expected to extend beyond the scheduled tour dates,” Blink-182’s official site read. “The band apologizes for any inconvenience as a result of these cancellations and thanks their fans for their ongoing support. ”

Dates at the Winstar Casino in Thackerville, Oklahoma, have been rescheduled for September 13 and 14, while six other dates have not been rescheduled.